Record-brushing attachment for gramophones



May 14, 1929. T. WATSON RECORD BRUSHING ATTACHMENT FOR GRAMOPHONES Filed July '7, 192'? TH Eo D WATSON- \NVENT R ATTIY.

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Patented May 14, 1929.

UITED STATES 1,712,637 PATENT OFFICE.

THEODORE WATSON, 0F EASTMELBOURNE, VICTORIA, AUSTRALIA, ASSIGNOR TO W'ATSONIA ENGINEERING AND MANUFACTURING COMPANY PROPRIETARY LIM- ITEID, 0F MELBOURNE, AUSTRALIA, A CORPORATION OF VICTORIA.

RECORD-BRUSHING ATTACHMENT FOR GEAMOPHONES.

Application filed July 7, 1927, Serial No.

One object of this invention is to provide an attachment for gramophone sound boxes and to make it easy to fasten it to sound boxes of various dimensions and contours.

A further object is to make the cleaning member, hereinafter called the brush, easily adjustable with its working edge bearing in the most eliective position on the record relatively to the needle, and so that it will sweep the groove from beginning to end. Sound boxes are differently located in diflerent machines relatively to record grooves, and tone arms swing in various ways relatively to the records. The tone arm pivots also diliier in positions. Adjustability oi the brush is consequently essential to secure the best cleaning effect, Sound boxes having different contours cannot all be satisfactorily gripped by ordinarily known means, and in order that almost every form of sound box known to me may be firmly gripped, I provide the features herein described.

I illustrate in the drawings herewith an embodiment of my invention, but the construction may be modified while retaining features hereinafter claimed. The attachment is shown enlarged, and. the scales vary.

Figure 1 is a plan of my attachment fitted to a sound box, part of a record being also shown.

Figure 2 is a sectional elevation on line 2-2 of Figure l.

Figure 3 shows, in perspective, the attachment frame without the brush.

Figure 4i shows, in perspective, a brush and its means for attachment to the frame.

Figure 5 shows, in perspective, part of a frame having on its fixed jaw an auxiliary removable lug.

A sheet metal frame or body 1 carries jaws to grip the rim R ofthe sound box S, and has a wing 2 to support a brush 13 below the sound box.

A fixed J extending from the body, and an adjustable jaw J extending from a limb 1 of the body, grip the sound box rim between them, each extension being at a right angle with the body. The adjustable jaw is shown concave to enable itsedgcs which are shown serrated to grip, and this jaw is slidable on the limb 1 and is pressed into gripping position by a nut 1 on the limb, which is screwthreaded. The adjust- 203,906, and in Australia July 19, 1926.

able jaw has a rigid channelled tail J on tending at an angle from it, the body 1, fitting in the channel according to the tail adjustment, this tail preventing rotation of an. adjustable jaw J the body act m; as u firm abutment when the attachment is fixed. I fit onjaw J opposite part of jaw J 8. lug or auxiliary jaw J which grips part of the sound box when required instead of or in addition to jaw J doing so, according to the particular contour to be gripped.

The rear of the member J has a slot or achannel having walls 3 to engage jaw J enabling the said member to be slid. along jaw J into any location appropriate to the contour of the sound box in use. The gripping edge of said auxiliary jaw is shaped with box surface.

The attachment has a neck N supporting wing 52 which has a curve seen in plan View, its location being clear above the record, see Figure 2. To enable the brush to work efi ectively on every part of the grooving while the record rotates in the direct-ion D shown by an arrow, the use of a curved wing is in'iportant.

This wing has a slot 5 carrying a lit-ting which supports the brush B, and that fitting extends to and locates the brush on the concave side of the wing, that is the side facing the needle S 7 The brush is removable at will, its stock fitting a socket B, for example. The socket connects with wing 2 by a lug T which is bendable, this lug being satisfactory when of somewhat springy sheet brass.

points 4 which. bite or hold the sound To adjust the lug T and support it, its

head 6 has a ridge 6 which fits into and is slidable in slot 5, means being provided to fix this head. temporarily in any adjusted position. The means shown comprise a pin 7 having on its head a ridge 7 A hole 6 in the ridge 6 receives the pin 7 the ridge oi the head of which fits the channel which constitutes the interior of theridge 6 The pin is screw threaded and carries aclamp nut 7 To fit this attachment in place the brush does not need to be set accurately at first, though it is convenient to set it approximately correctly relatively to the record. The distance between the jaws J J or J J is regulated to cause them to grip I the sound box. Then the brush should be brought into accurate working position by slidingthe head 6 along groove until the brush outer'edge covers the first groove G of therecord when the needle is in that groove. The plug T will be bent suitably to secure the desired true bearing of the brush on the record surface.

I claim 1. A mounting for a phonograph record brush, comprising in combination, a clamping member adapted tobe secured to the sound-box, a downwardly bent curved slotted wing fixed to the clamping member and -a brush carrier fixed adjustably in the slot of the curved wing.

2; -A;mounting for aphonograph record brush, comprislng in combination a body 3. An1ounting for a phonograph record wardly bent arm on the brush carrier, having a slide forming upper end, adapted to slide within the said slot, and means for fixing the slide tormmg end of the said arm at a chosen position within the said slot.

1-. A mounting for a phonograph record brush, comprising in combination, a body part of the clamping member, a fixed arm on the said body part, a lug adjustably secured to the said fixed arm, and having gripping edges adapted to hold or bite the one side of the sound box surface, a movable jaw adjustably mounted on the body part, and having a bent face with tooth like scrrated edges, adapted to hold or bite the other'side ot the sound box surface, a nut screwable on the body part for fixing the movable jaw in the sound box clamping position, a downwardly bent curved wing on the said body part, and a brush carrier fixed adiustably to the said curved wing.

In witness whereof I have hereunto set my hand.

THEODORE \VATSON. 

